Method oe operating head-blocks of sawmills



AM. PHOTO-LITHO. C0. KY. (DSBORNES PRD UNTTED sTATEs PATENT orricn.

JOHN M. CARLISLE, OF WILLIAMSTON SPRINGS, SOUTH CAROLINA.

METHOD 0F OPERATING HEAD-BLOCKS 0F SAWMILLS.

Specification of Letters Patent No. 15,062, dated June 10, 1856.

To all whom t may concern Be it known that I, JOHN M. CARLISLE, ofIVilliamston Springs, in the district of Anderson and State of SouthCarolina, have invented a new and useful Improvement in Sawing-Machines;and I do hereby declare that the following is a full, clear, and exactdescription of the same, reference. being had to the annexed drawings,making a part of this specification, in which- Figure l, is alongitudinal vertical section of my improvement, Fig. 2, showing theplane of section. Fig. 2, is a plan or top View of the same. Fig. 3, isa transverse vertical section of the same, (y), (y), sho-wing the planeof section.

Similar let-ters of reference indicate corresponding parts in theseveral figures.

My invent-ion consists in the peculiar means employed for operating thecarriage,

l or feeding the log to the saw and also setting the log as will behereinafter fully shown and described.

To enable those skilled in the art to fully understand and construct myinvent-ion, I will proceed to describe it.

A, represents acircular saw, the arbor (a), of which is tted in suitableframing B.

C, represents a carriage on which the log or stuff to be sawed isplaced. This carria-ge works on ways D, D, the ends of which are securedto ledges (b), (b), on the platform or flooring E. On the carriage thereis placed a longitudinal shaft D', having a ratchet wheel E, upon it,and two pinions F, F. These pinions gear into racks G, Gr, which areattached to abar H, placed longitudinally on the carriage, the racksworking through guides (c), (c), on the carriage.

I, represents a sliding bar fitted transversely in the carriage C,andhavingapawl J, attached to it, said pawl catching into or between theteeth of the ratchet E, see Figs. 2 and 3. To the under side of thesliding bar I, there are attached two pins (cl), (el), o-ne of which isadjustable.

K, represents an endless apron which works around the vert-ical pulleysL, M, on the plat-form or flooring E. One of these pulleys M, has atoot-hed wheel N, on its lower end, and a pinion O, gears into thiswheel, the pinion being upon a shaft P, which has a pulley Q., upon itdriven by the belt R, which belt drives the saw A.

S, is the driving pulley around which the belt R, passes.

To the underside of the carriage C, there is attached an arm T, said armbeing pivoted to the carriage. The outer end of the arm is curved orbent downward so that it will fit in a socket U, attached to the endlessbelt K.

The operation is as follows. Mot-ion is given the driving pulley S, inany proper manner and the endless belt K, is operated by the gearing N,O, previously described, and as the belt K, moves, the carriage C, o-fcourse has a reciprocating motion communicated to it, as it is attachedto the belt- K by the arm T, the outer end of which passes around thepulleys L, M, as the outer end of the arm passes around the pulleys thearm will strike against the pins (d), (d), and actuate the slide I, andthe pawl J, will turn the ratchet E, and move the bar H, and also thelog which isr placed or attached to the side of the said bar. The logconsequently will be operated or set to the saw at each stroke orvibration of the carriage and as one of the pins is adjustable the logmay be moved a greater or less distance at each stroke of the carriageso that the log may be sawed into stuff of greater or less thickness.

A suitable stop lever or device may be employed to prevent the bar H,from being brought in contact with the saw.

By the above improvement, the feed movement of the carriage is renderedautomatic and also the setting or adjusting movement whereby the log isset to the saw.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent, is-

Attaching or connecting the carriage C, to an endless chain or belt bymeans of an arm T, arranged as shown so that it will actuate, at eachend of the stroke of the carriage, a slide I, having a pawl J, attachedwhich, by means of suitable gearing as shown, moves or sets the log tothe saw whereby the feed movement of the carriage and also the settingmovement of the log are rendered automatic or self acting, as hereindescribed.

JOHN M. CARLISLE.

